CN111894793B - Wind generating set blade zero position adjusting method and system and wind generator - Google Patents
Wind generating set blade zero position adjusting method and system and wind generator Download PDFInfo
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- CN111894793B CN111894793B CN202010825559.3A CN202010825559A CN111894793B CN 111894793 B CN111894793 B CN 111894793B CN 202010825559 A CN202010825559 A CN 202010825559A CN 111894793 B CN111894793 B CN 111894793B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0658—Arrangements for fixing wind-engaging parts to a hub
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a wind generating set blade zero position adjusting method, a wind generating set blade zero position adjusting system and a wind generator, and relates to the technical field of wind power. The method comprises the steps that a first load sensor, a second load sensor, a third load sensor and a fourth load sensor are arranged at the position of a blade root of a blade of the generator set and are sequentially located at 180 degrees, 0 degrees, 270 degrees and 90 degrees; adjusting the blade angle to 90 degrees, rotating the blade, and determining the maximum moment value of the blade according to the detection values of the third load sensor and the fourth load sensor; and determining the zero position of the blade according to the position of the maximum moment value, and adjusting the blade to zero degree according to the zero position. According to the method, the absolute zero position of the blade can be accurately known through a mechanical principle that the angle between the position of the maximum torque value and the zero position is a fixed value, and the absolute zero position cannot be influenced by external factors. Meanwhile, the zero position can be determined through detection of the sensor, and the device is convenient to operate and high in efficiency.
Description
Technical Field
The invention relates to the technical field of wind power, in particular to a method and a system for adjusting zero position of blades of a wind generating set and a wind driven generator.
Background
The blade zero-position installation angle of the fan is mainly determined by a fan blade installation angle ruler and a mode corresponding to a fan hub blade wheel-mounted pointer. Under the condition that a control system of a fan blade is not changed, if the zero-degree angle position of the fan blade is not accurately calibrated, certain deviation exists between the torque of the fan blade at different wind speeds and a design value, so that the rotating speed and the torque of the fan cannot operate according to the condition set by the control system, and the generated energy of the fan is further influenced. Meanwhile, when the zero-degree installation positions of the same fan blades deviate, unbalance, stability, vibration and load of the fan during operation can be influenced to a certain extent.
In the prior art, in order to calibrate the zero-degree installation angle of the fan blade, the blade is photographed and subjected to image processing, and the processing result is compared with the design parameters to determine the zero position of the blade, so that the problems of complex operation and low efficiency of the method exist.
Disclosure of Invention
The invention aims to provide a method and a system for adjusting the zero position of a blade of a wind generating set and the wind generating set.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides a method for adjusting a zero position of a blade of a wind turbine generator system, including:
a first load sensor, a second load sensor, a third load sensor and a fourth load sensor are arranged at the blade root of the blade of the generator set and are sequentially positioned at 180 degrees, 0 degrees, 270 degrees and 90 degrees, wherein in an initial state, a connecting line of the first load sensor and the second load sensor is positioned in a horizontal direction, and a connecting line of the third load sensor and the fourth load sensor is positioned in a vertical direction;
adjusting the blade angle to 90 degrees, rotating the blade, and determining the maximum moment value of the blade according to the detection values of the third load sensor and the fourth load sensor;
and determining the zero position of the blade according to the position of the maximum moment value, and adjusting the blade to zero degree according to the zero position.
In an alternative embodiment, the step of adjusting the blade angle to 90 ° and rotating the blade to determine the maximum moment value of the blade according to the detection values of the third load sensor and the fourth load sensor specifically includes:
rotating the blade within a preset angle range;
detecting a moment change of the blade by a third load sensor and a fourth load sensor;
and determining the maximum torque value according to the torque variation relation detected by the third load sensor and the fourth load sensor.
In an alternative embodiment, the step of determining the maximum torque value according to the detected torque variation relationship between the third load sensor and the fourth load sensor specifically includes:
the moment variation relation of the third load sensor and the fourth load sensor satisfies f (alpha) ═ mgL cos (alpha), wherein alpha is the rotation angle of the blade, L is the distance from the root of the blade to the gravity center of the blade, and mg is the mass of the blade.
In an alternative embodiment, the preset angle is 90 ° ± 20 °.
In an alternative embodiment, the preset angle is 90 ° ± 10 °.
In an alternative embodiment, the step of determining the zero position of the blade according to the position of the maximum torque value and adjusting the blade to zero degree according to the zero position specifically includes:
subtracting 90 degrees from the angle corresponding to the position of the blade at the maximum moment value, and determining the zero position of the blade;
and adjusting the blade to zero degrees according to the zero position.
In an alternative embodiment, the first load sensor, the second load sensor, the third load sensor and the fourth load sensor are all fiber grating sensors.
In an alternative embodiment, the first load sensor, the second load sensor, the third load sensor and the fourth load sensor are all strain gauges.
In a second aspect, an embodiment of the present invention provides a blade zeroing system for a wind turbine generator system, including:
the system comprises a first load sensor, a second load sensor, a third load sensor and a fourth load sensor, wherein the first load sensor, the second load sensor, the third load sensor and the fourth load sensor are arranged at the blade root of a generator set blade at intervals; and are sequentially positioned at 180 degrees, 0 degrees, 270 degrees and 90 degrees; in the initial state, a connecting line of the first load sensor and the second load sensor is positioned in the horizontal direction, and a connecting line of the third load sensor and the fourth load sensor is positioned in the vertical direction;
the driving mechanism is used for driving the blades to move until the blade angle is 90 degrees, and the driving blades rotate in a preset angle;
and the control mechanism is electrically connected with the first load sensor, the second load sensor, the third load sensor, the fourth load sensor and the driving mechanism, and is used for determining the maximum torque value of the blade according to the detection values of the third load sensor and the fourth load sensor in the rotating process of the blade, determining the zero position of the blade according to the maximum torque value, and driving the driving mechanism to drive the blade to move to zero degree according to the zero position.
In a third aspect, an embodiment of the present invention provides a wind turbine, including the wind turbine blade zeroing system of the foregoing embodiment.
The embodiment of the invention has at least the following advantages or beneficial effects:
the embodiment of the invention provides a zero position adjusting method for a blade of a wind generating set, which comprises the steps of installing a first load sensor, a second load sensor, a third load sensor and a fourth load sensor at the position of a blade root of the blade of the wind generating set, and sequentially locating the first load sensor, the second load sensor, the third load sensor and the fourth load sensor at positions of 180 degrees, 0 degrees, 270 degrees and 90 degrees, wherein in an initial state, a connecting line of the first load sensor and the second load sensor is located in a horizontal direction, and a connecting line of the third load sensor and the fourth load sensor is located in a vertical direction; adjusting the blade angle to 90 degrees, rotating the blade, and determining the maximum moment value of the blade according to the detection values of the third load sensor and the fourth load sensor; and determining the zero position of the blade according to the position of the maximum moment value. The position of the maximum moment value can be effectively measured by the vertical orthogonal distribution of the four load sensors, and the absolute zero position of the blade can be accurately known by the mechanical principle that the angle of the difference between the position of the maximum moment value and the zero position is a fixed value, so that the blade cannot be influenced by external factors. Meanwhile, the zero position can be determined through detection of the sensor, and the device is convenient to operate and high in efficiency.
The embodiment of the invention also provides a wind generating set blade zero position adjusting system and a wind generating set, the system can effectively measure the position of the maximum moment value through the vertical orthogonal distribution of the four load sensors, and the absolute zero position of the blade can be accurately known through the mechanical principle that the angle between the position of the maximum moment value and the zero position is a fixed value, so that the blade cannot be influenced by external factors. Meanwhile, the zero position can be determined through detection of the sensor, and the device is convenient to operate and high in efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram I of a blade zero adjustment system of a wind turbine generator system according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram II of a blade zero adjustment system of a wind generating set according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram III of a blade zero adjustment system of a wind generating set according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a blade zero adjustment system of a wind turbine generator system according to an embodiment of the present invention;
FIG. 5 is a first flowchart illustrating a method for adjusting a zero position of a blade of a wind turbine generator system according to an embodiment of the present invention;
fig. 6 is a schematic flow diagram of a wind turbine generator system blade zero adjustment method according to an embodiment of the present invention.
100-a wind generating set blade zero adjustment system; 101-a first load sensor; 103-a second load sensor; 105-a third load sensor; 107-fourth load cell; 109-a drive mechanism; 111-a control mechanism; 113-leaf.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
FIG. 1 is a schematic diagram I of a blade zero adjustment system 100 of a wind turbine generator system according to an embodiment; FIG. 2 is a schematic structural diagram II of a blade zero adjustment system 100 of a wind turbine generator system according to the present embodiment; FIG. 3 is a schematic structural diagram III of a blade zero adjustment system 100 of a wind turbine generator system according to the present embodiment; fig. 4 is a schematic structural diagram of a wind turbine blade zeroing system 100 according to an embodiment of the present invention. Referring to fig. 1 to 4, the embodiment provides a blade zero-position adjustment system 100 for a wind turbine generator set, which is mainly installed on a blade 113 of a wind turbine generator, and is used for adjusting an installation position of the blade 113 and ensuring that the blade 113 is installed at a zero position, so as to ensure that the fan blade 113 can operate according to a condition set by the system, and ensure balance and stability of fan operation.
In detail, referring to fig. 1 to 4 again, in the present embodiment, the wind turbine blade zeroing system 100 mainly includes a first load sensor 101, a second load sensor 103, a third load sensor 105, a fourth load sensor 107, a control mechanism 111, and a driving mechanism 109.
Specifically, the first load sensor 101, the second load sensor 103 and the third load sensor 105 are all arranged at the root of the fan blade 113 at intervals, and are sequentially located at positions of 180 °, 0 °, 270 ° and 90 °; in the initial state, the line connecting the first load sensor 101 and the second load sensor 103 is in the horizontal direction, and the line connecting the third load sensor 105 and the fourth load sensor 107 is in the vertical direction. With such an arrangement, the bending moment of the blade root mainly includes two directions, i.e. a flapwise direction (flapwise) of the blade 113 and a flapwise direction (edgewise) of the blade 113, the flapwise direction of the blade 113 is a direction perpendicular to the chord line, i.e. a direction which can be monitored by the third load sensor 105 and the fourth load sensor 107, and the flapwise direction of the blade 113 is a direction parallel to the chord line, i.e. a direction which can be monitored by the first load sensor 101 and the second load sensor 103.
Specifically, the driving mechanism 109 is used to drive the blade 113 to move to a blade angle of 90 °, and the driving blade 113 rotates within a preset angle. The blade 113 is driven to a blade angle of 90 ° by the driving mechanism 109, and at this time, if the third load sensor 105 and the fourth load sensor 107 are kept vertical, the measurement value is the moment generated by gravity, and the component of the gravity moment measured by the trailing pitch is smaller than the moment generated by gravity, so that when the blade 113 is driven to rotate within a preset angle by the driving mechanism 109, the moments measured by the third load sensor 105 and the fourth load sensor 107 change in cosine, and the blade angle corresponding to the maximum moment value can be derived according to the changing formula.
Specifically, the control mechanism 111 is electrically connected to the first load sensor 101, the second load sensor 103, the third load sensor 105, the fourth load sensor 107 and the driving mechanism 109, and is configured to determine a maximum torque value of the blade 113 according to detection values of the third load sensor 105 and the fourth load sensor 107 during rotation of the blade 113. Meanwhile, the control mechanism 111 may also determine a zero position of the blade 113 according to the maximum torque value, that is, the zero position is determined by subtracting 90 ° from the blade angle of the position corresponding to the maximum torque value, so that the driving mechanism 109 may be driven to drive the blade 113 to move to zero degree according to the zero position. Therefore, the wind turbine generator system blade zero position adjustment system 100 provided by this embodiment can effectively measure the position of the maximum torque value by the vertical orthogonal arrangement of the four load sensors, and can accurately know the absolute zero position of the blade 113 by the mechanical principle that the angle between the position of the maximum torque value and the zero position is a fixed value, and is not affected by external factors. Meanwhile, the zero position can be determined through detection of the sensor, and the device is convenient to operate and high in efficiency.
It should be noted that in this embodiment, the driving mechanism 109 may be selected from a driving motor, a driving cylinder, and other components capable of providing a driving force, which is not modified in this embodiment and will not be described herein again. Meanwhile, the control mechanism 111 may be a programmable logic controller, or even a control structure such as a single chip or a computer, or a general control module, which is not improved in this embodiment and will not be described herein.
Fig. 5 is a first flowchart of a method for adjusting the zero position of the blade 113 of the wind turbine generator system according to this embodiment. To describe in detail the specific process of adjusting by using the wind turbine generator system blade zero adjustment system 100, referring to fig. 5, the embodiment further provides a wind turbine generator system blade 113 zero adjustment method, which specifically includes the following steps:
s1 mounting a sensor: a first load sensor 101, a second load sensor 103, a third load sensor 105 and a fourth load sensor 107 are mounted at the root of the genset blade 113, and are located at positions of 180 °, 0 °, 270 ° and 90 ° in sequence. In the initial state, a connecting line of the first load sensor 101 and the second load sensor 103 is located in the horizontal direction, and a connecting line of the third load sensor 105 and the fourth load sensor 107 is located in the vertical direction;
in detail, the first load sensor 101, the second load sensor 103, the third load sensor 105, and the fourth load sensor 107 may be mounted by fasteners such as screws or bolts, or an insertion column may be provided on one of the load sensor or the blade 113, and an insertion groove may be provided on the other, so that the two are inserted and matched to facilitate detachment. Of course, the fan is firm in a fastening installation mode under severe conditions for a long time.
It should be noted that, in this embodiment, four load sensors are specifically adopted, but in other embodiments, the number of the load sensors may also be greater than four, for example, five, six, or even more, and this embodiment is not limited.
S2 determining the maximum torque value: adjusting the blade angle to 90 degrees, rotating the blade 113, and determining the maximum moment value of the blade 113 according to the detection values of the third load sensor 105 and the fourth load sensor 107;
in detail, fig. 6 is a schematic flow chart of a method for adjusting the zero position of the blade 113 of the wind turbine generator system according to the embodiment. Referring to fig. 6, the steps specifically include:
s21: rotating the blades 113 within a preset angle range;
specifically, the preset angle is 90 ° ± 20 °. And preferably, the preset angle is 90 ° ± 10 °. The range of plus or minus 20 degrees or 10 degrees within the range of 90 degrees of the blade angle is obtained according to daily experience and common operation requirements, the range value of the range is not more than 20 degrees and generally not more than 10 degrees, so that the variation range of the blade angle is controlled within the range, components can be effectively saved, the adjustment time is saved, and the adjustment efficiency is improved. Of course, in other embodiments, the preset angle may be adjusted within a certain range according to different installation conditions of the fan, and this embodiment is not limited.
S22: the moment variation of the blade 113 detected by the third load sensor 105 and the fourth load sensor 107;
s23: the maximum torque value is determined based on the detected torque variation relationship of the third load sensor 105 and the fourth load sensor 107.
Specifically, the step of determining the maximum torque value according to the detected torque variation relationship between the third load sensor 105 and the fourth load sensor 107 specifically includes:
the torque variation relationship between the third load sensor 105 and the fourth load sensor 107 satisfies f (α) ═ mgL × cos (α), where α is the rotation angle of the blade 113, L is the distance from the root of the blade 113 to the center of gravity of the blade 113, and mg is the mass of the blade 113. The moment measured by the third load sensor 105 and the fourth load sensor 107 is changed in cosine, so that the blade angle corresponding to the maximum moment value can be deduced according to a change formula.
S23: and determining the zero position of the blade 113 according to the position of the maximum moment value, and adjusting the blade 113 to zero degree according to the zero position.
Specifically, step S23 specifically includes:
subtracting 90 degrees from the angle corresponding to the position of the blade 113 at the maximum moment value, and determining the zero position of the blade 113; and adjusts the vane 113 to zero degrees according to the zero position. That is, the zero position of the blade 113 is determined according to the maximum torque value, that is, the blade angle at the position corresponding to the maximum torque value minus 90 ° is the actual zero position, so that the driving mechanism 109 can be driven according to the zero position to drive the blade 113 to move to zero degree. Therefore, the zero adjustment method for the blades 113 of the wind turbine generator system provided by this embodiment can effectively measure the position of the maximum torque value by the vertical orthogonal arrangement of the four load sensors, and can accurately obtain the absolute zero of the blades 113 by the mechanical principle that the angle between the position of the maximum torque value and the zero is a fixed value, and is not affected by external factors. Meanwhile, the zero position can be determined through detection of the sensor, and the device is convenient to operate and high in efficiency.
In the present embodiment, the first load sensor 101, the second load sensor 103, the third load sensor 105, and the fourth load sensor 107 are all fiber grating sensors. The fiber grating sensor can reflect the deformation of the measured object (such as the bending moment of the blade root) by the wavelength. More specifically, the fiber grating technology is formed by using an ultraviolet exposure technique to induce a periodic variation in the refractive index in the core of the optical fiber. The periodic structure of the refractive index distribution in the fiber grating causes the reflection of light of a certain wavelength, thereby forming the reflection spectrum of the fiber grating. The fiber grating sensor is usually made by attaching the fiber grating to some elastic body and performing protection packaging. The wavelength of the reflected light is very sensitive to temperature, stress and strain, when the elastic body is subjected to pressure, the fiber grating and the elastic body deform together, so that the peak wavelength of the reflected light of the fiber grating shifts, and the temperature, the stress and the strain are sensed by measuring the wavelength shift. Of course, in other embodiments, the first load sensor 101, the second load sensor 103, the third load sensor 105, and the fourth load sensor 107 may also be selected as strain gauges, which is not limited in this embodiment.
In addition, the embodiment also provides a wind driven generator, which comprises the wind generating set blade zero adjustment system 100 of the previous embodiment. Therefore, the position of the maximum torque value can be effectively measured, and the absolute zero position of the blade 113 can be accurately known through the mechanical principle that the difference angle between the position of the maximum torque value and the zero position is a fixed value, so that the absolute zero position cannot be influenced by external factors.
The following describes in detail the operation principle of the wind turbine generator set blade 113 zero adjustment method, system and wind turbine generator according to the embodiment of the present invention:
in the present embodiment, the first load sensor 101, the second load sensor 103, the third load sensor 105 and the fourth load sensor 107 are disposed in a 90 ° orthogonal distribution, so that the load in the blade 113 flapwise direction is only related to the signals of the first load sensor 101 and the second load sensor 103, and similarly, the load in the blade 113 flapwise direction is only related to the signals of the third load sensor 105 and the fourth load sensor 107. Therefore, when the blade angle is rotated in the vicinity of 90 °, the measurement value of the third load sensor 105 and the fourth load sensor 107 is a moment due to gravity when they are kept vertical, and the component of the gravity moment is measured when they are tilted. Therefore, the maximum torque value can be determined according to the change of the torque, and the absolute zero position can be determined through the mechanical relation when the maximum torque value is different from the zero position by 90 degrees all the time.
In summary, the zero position adjustment method, system and fan generator for the blades 113 of the wind turbine generator system provided by the embodiments of the present invention can effectively measure the position of the maximum torque value by the vertical orthogonal arrangement of the four load sensors, and can accurately obtain the absolute zero position of the blade 113 by the mechanical principle that the angle between the position of the maximum torque value and the zero position is a fixed value, and is not affected by external factors. Meanwhile, the zero position can be determined through detection of the sensor, and the device is convenient to operate and high in efficiency.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A wind generating set blade zero adjustment method is characterized by comprising the following steps:
a first load sensor, a second load sensor, a third load sensor and a fourth load sensor are arranged at the blade root of a blade of a generator set and are sequentially positioned at 180 degrees, 0 degrees, 270 degrees and 90 degrees, wherein in an initial state, a connecting line of the first load sensor and the second load sensor is positioned in the horizontal direction, and a connecting line of the third load sensor and the fourth load sensor is positioned in the vertical direction;
adjusting the blade angle to 90 degrees, rotating the blade, and determining the maximum moment value of the blade according to the detection values of the third load sensor and the fourth load sensor;
and determining a zero position of the blade according to the maximum moment value, and adjusting the blade to zero degree according to the zero position.
2. The method for zeroing a blade of a wind turbine generator system according to claim 1, wherein the step of adjusting the blade angle to 90 ° and rotating the blade to determine the maximum moment value of the blade according to the detection values of the third load sensor and the fourth load sensor specifically comprises:
rotating the blades within a preset angle range;
detecting a moment variation of the blade by the third load sensor and the fourth load sensor;
and determining a maximum torque value according to the torque variation relation detected by the third load sensor and the fourth load sensor.
3. The wind turbine blade zeroing method of claim 2, wherein the step of determining the maximum torque value according to the detected torque variation relationship of the third load sensor and the fourth load sensor specifically comprises:
the moment variation relation of the third load sensor and the fourth load sensor satisfies f (alpha) ═ mgL × cos (alpha), where alpha is the rotation angle of the blade, L is the distance from the root of the blade to the center of gravity of the blade, and mg is the mass of the blade.
4. The wind turbine blade zeroing method of claim 2, wherein:
the preset angle is 90 ° ± 20 °.
5. The wind turbine blade zeroing method of claim 4, wherein:
the preset angle is 90 ° ± 10 °.
6. The wind turbine generator system blade zero adjustment method according to any one of claims 1 to 5, wherein the step of determining the zero position of the blade according to the maximum torque value and adjusting the blade to zero degree according to the zero position specifically comprises:
subtracting 90 degrees from the angle corresponding to the position of the blade at the maximum moment value, and determining the zero position of the blade;
and adjusting the blade to zero degree according to the zero position.
7. The wind turbine generator system blade zeroing method according to any one of claims 1 to 5, wherein:
the first load sensor, the second load sensor, the third load sensor and the fourth load sensor are all fiber grating sensors.
8. The wind turbine generator system blade zeroing method according to any one of claims 1 to 5, wherein:
the first load sensor, the second load sensor, the third load sensor and the fourth load sensor are all strain gauges.
9. A wind generating set blade zero adjustment system characterized in that includes:
the system comprises a first load sensor, a second load sensor, a third load sensor and a fourth load sensor, wherein the first load sensor, the second load sensor, the third load sensor and the fourth load sensor are arranged at the position of a blade root of a generator set blade at intervals; and are sequentially positioned at 180 degrees, 0 degrees, 270 degrees and 90 degrees; in an initial state, a connecting line of the first load sensor and the second load sensor is positioned in a horizontal direction, and a connecting line of the third load sensor and the fourth load sensor is positioned in a vertical direction;
the driving mechanism is used for driving the blades to move until the blade angle is 90 degrees, and driving the blades to rotate within a preset angle;
and the control mechanism is electrically connected with the first load sensor, the second load sensor, the third load sensor, the fourth load sensor and the driving mechanism, and is used for determining the maximum torque value of the blade according to detection values of the third load sensor and the fourth load sensor in the rotation process of the blade, determining the zero position of the blade according to the maximum torque value, and driving the driving mechanism to drive the blade to move to zero.
10. A wind power generator characterized by: the wind turbine blade zeroing system of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010825559.3A CN111894793B (en) | 2020-08-17 | 2020-08-17 | Wind generating set blade zero position adjusting method and system and wind generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010825559.3A CN111894793B (en) | 2020-08-17 | 2020-08-17 | Wind generating set blade zero position adjusting method and system and wind generator |
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| Publication Number | Publication Date |
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| CN111894793A CN111894793A (en) | 2020-11-06 |
| CN111894793B true CN111894793B (en) | 2021-10-29 |
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